Revision as of 19:03, 17 November 2012

The VES has four usable 8-bit data ports in the console, port 0 and 1 that are in the 3850 CPU and port 4 and 5 on one of the 3851 Program Storage Units. These I/O:s are hooked to specific functions as shown in the table below.

Port 0

Port 1

0 Right controller right
1 Right controller left
2 Right controller back
3 Right controller forward
4 Right controller counter clockwise
5 Right controller clockwise
6 Right controller pull
7 Right controller push

Port 4

Port 4 has double duties and serve left controller
as well as horizontal video position.

0 Left controller right
1 Left controller left
2 Left controller back
3 Left controller forward
4 Left controller counter clockwise
5 Left controller clockwise
6 Left controller pull
7 Left controller push